[q-bio.PE] Translation of the genetic code into proteins is universal across life, with ribosomes serving as the ancient molecular machines enabling this information transformation. We propose that early replication and […]
Biochemistry & Organic Chemistry
![Infrared spectra of pure H2S (blue) and H2O:H2S (10:1) (red) ice mixtures after UV irradiation followed by warm-up to room temperature, measured at 300 K. The residue from the H2S ice does not show any IR absorption band. Functional groups assigned to bands in the H2O:H2S (10:1) residue are indicated at the top; vibrational bands and assignments are also listed in Table 1, along with possible carrier species or chemical families producing those features. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Water-.png?resize=1200%2C720&ssl=1)
Posted inAstrochemistry
Water Enhances The Formation Of Refractory Sulfur In Interstellar Ices
[astro-ph.GA] Sulfur is the tenth most abundant element in space, yet it is strongly depleted in the gas phase of dense interstellar regions, suggesting sequestration in dust grain components that […]
Posted inAstrochemistry
Chemical Diversity Of Dense Cores In Orion B: The Role Of The Environment
[Astronomy & Astrophysics] Context. Pre-stellar cores are the sites of the earliest stages of star formation. Dust continuum observations are often used to identify and characterise their properties yet only […]
![Rest-frame equivalent widths of C iii] 𝜆𝜆1907, 1909 (left) and C iv 𝜆𝜆1548, 1550 (right) against the direct 𝑇e-based ([O III]𝜆4363) metallicity. Curves are the star-forming photoionisation grids of Nakajima et al. (2018) at a burst age of 1 Myr and log(𝑛H/cm−3 ) = 3. Solid curves represent the POPSTAR single-star models (Mollá et al. 2009), and dashed curves indicate the BPASS binary models (Eldridge et al. 2017), coloured by ionisation parameter as shown in the colour-bar. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Precise.png?resize=1200%2C720&ssl=1)
Posted inAstrochemistry
Precise C-N-O Abundances of Individual Galaxies In The First Billion Years From Ultra-Deep, Rest-UV-to-Optical JWST Spectroscopy
[astro-ph.GA] We present ultra-deep JWST/NIRSpec 𝑅 ∼ 1000 spectroscopy of nine star-forming galaxies at 𝑧 = 6.0 − 8.3 in the GOODSN field, drawn from the Origins of Metal Enrichment […]
Posted inAstrochemistry
Secondary Ion-Ice Chemistry in UV-Irradiated Oxygen Ice: New Astrochemical Models Including Bulk Ionic Species
[ACS Earth Space Chemistry] Although energetic and nonenergetic processing of interstellar dust grain surfaces and ice is thought to be one of the dominant mechanisms for the extraterrestrial synthesis of […]
Posted inGenomics, Proteomics, Bioinformatics
Catalog Of Mitochondria Across Life’s Family Tree Unearths New Roles For The Cell’s Powerhouse
[Broad Institute of MIT and Harvard] A research consortium has generated the broadest look yet at the proteins that make up mitochondria, capturing the organelle’s diversity across multiple branches on […]
Posted inTitan
Flow Dynamics Of Cryolava Or Impact Melt On Titan’s surface
[astro-ph.EP] Titan, a unique body in the solar system, resembles a life-size Miller-Urey experiment where pockets of liquid water might interact with abundant organic matter.
Posted inAway Teams & Field Reports
NASA Scientists Search For Clues About Mars’ Past In Scotland
[NASA] This summer, NASA scientists headed to the Scottish Highlands to follow up on last year’s announcement of potential biosignatures on Mars and prepare for future research.
![Visual abstract -- [Journal of the American Chemical Society]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Nonequilibrium.jpg?resize=1200%2C716&ssl=1)
Posted inAstrochemistry
Nonequilibrium Formation of Pyridine (C5H5N) in Interstellar Ice Analogs: Implications for Biorelevant Nitrogen Heterocycles in Ryugu and Bennu
[Journal of the American Chemical Society] Biorelevant nitrogen heterocycles, including the five canonical nucleobases found in RNA and DNA, have recently been identified in samples returned from the carbonaceous asteroids […]
Posted inAstrochemistry
The Abundance And Emission Of PAHs From The Local To Early Universe
[astro-ph.GA] We present the first large-volume cosmological simulation of galaxy evolution with a model for the abundance and luminous emission of Polycyclic Aromatic Hydrocarbons (PAHs) across a wide range of […]